Mr Yolles is a William R. Tyler Fellow in Byzantine Studies at the Dumbarton Oaks Research Library. He is currently finishing a PhD dissertation on ‘Reading and writing in the Latin East: Latin culture in the Crusader States (1099-1187)’ in the Department of the Classics at Harvard University. Together with Jessica Weiss he is preparing the first English translations of several medieval Latin lives of Muhammad for a volume in the Dumbarton Oaks Medieval Library.